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Finding the Fourth Proportional to 143,622.45, 198,193.64 and 79,958.88

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Solution

The fourth proportional to 143,622.45, 198,193.64 and 79,958.88 is: 110,340.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,622.45 : 198,193.64 = 79,958.88 : x
  2. Step 2: Convert to fraction form
    143,622.45/198,193.64 = 79,958.88/x
  3. Step 3: Cross multiply
    143,622.45x = 198,193.64 × 79,958.88
  4. Step 4: Simplify right side
    143,622.45x = 15,847,341,077.73
  5. Step 5: Solve for x
    x = 15,847,341,077.73/143,622.45
  6. Step 6: Final answer
    x = 110,340.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.